Started in the wake of George Zimmerman's 2013 acquittal in the death of Trayvon Martin, the #BlackLivesMatter movement has become a powerful campaign demanding redress for the mistreatment of African-Americans by law enforcement in the United States. But it has also inspired deep antipathy from those who claim it overemphasizes racial issues. So how much does – and should – race matter? Does #BlackLivesMatter speak for all black people? How should we respond to counter-movements like #AllLivesMatter? Ken and Debra discuss matters with Chris Lebron from Johns Hopkins University, author of The Making of Black Lives Matter: A Brief History of an Idea.